Visible Contamination
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Desafios e possibilidades do ensino de arte nas séries iniciais: uma pesquisa simbólica.
By my professional experience as Arts teacher of a state school, came the dissatisfaction in relation to the way the teaching of arts is, that stimulated us to unveil movements that configured the practice of the Arts teachers specially those that orientate the initial grades of Elementary School. For such, we assumed as our main research goal: Understanding
Publicado em: 2007
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14. Avaliação de impactos ambientais nos tributários do lago Paranoá, Brasília - DF
The high level of urbanization in Distrito Federal in Brazil is contributing to modify the environment particularly the quality of surface water resources. The historical of environment aggression to the Paranoá Lake through urban expansion, land use and land occupation, is studied as environmental changes. In this work, physical-chemistry conditions and ge
Publicado em: 2007
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15. As rochas alcalinas de Cananéia, litoral sul do Estado de São Paulo: estudos mineralógicos, geoquímicos e isotópicos / Alkaline rocks of Cananéia, south coast of the state of São Paulo: mineralogy, geochemistcal and isotopical studies
The alkaline occurrence of Cananéia, SE Brazil, lying in the southern part of the homonymous island, is a subcircular intrusion 1.8 km² in area (Morro de São João) and 137 m high. A small and petrographically similar satellite body (Morrete) is found in the adjacent Ilha Comprida. Geomorphologically, it belongs to the Cananéia-Iguape Coast Plain. It is
Publicado em: 2007
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16. Caracterização de isolados de Erwinia Psidii do Distrito Federal e detecção sorológica em goiabeiras
The bacterial blight of guava (Psidium guajava L.) caused by Erwinia psidii is a serious disease affecting orchards in Brazil and it has not been reported in any other country. In Brazil, it was first detected in São Paulo state in 1982. Currently it is present in the Federal District (DF) and three other states (Minas Gerais, Espírito Santo and Paraná).
Publicado em: 2006
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17. Composição e atividade antifúngica do óleo essencial de hortelã-pimenta (Mentha piperita L.) / Composition and antifungal activity of pepper mint (Mentha piperita L.) essential oil
Pepper mint (Mentha piperita L.) essential oil (EO), obtained by hydro distillation of dry leaves, was evaluated in vitro through a poison food assay (0.1; 0.2 and 0.3%) presented antifungal activity against Aspergillus flavus, A. ochraceous, A. niger, A. glaucus, Fusarium oxysporum, F. semitectum, Colletotrichum musae and C. gloeosporioides. The EO was frac
Publicado em: 2006
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18. Influence of the chemical composition of the pulp kraft bleaching by the sequences ODHT(PO)D and ODHT(PO)DP on the process of brightness reversion / Influência da composição química da polpa kraft branqueada pelas seqüências ODHT(PO)D E ODHT(PO)DP no processo de reversão de alvura
In this work a study on the chemical composition of pulps of Kraft cellulose whitened before and after the test of dry reversion was carried out aiming to know the processes of reversion of whiteness. Samples of pulps were analyzed, given by the industry, collected after each one of the stages of whitened through the sequence of ODHT(PO)D. It was also done t
Publicado em: 2005
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19. Resistencia a la enfermedad de cría yesificada por colonias de Apis mellifera con eficiente comportamiento higiénico (Hymenoptera, Apidae)
In an apiary composed of 14 hygienic and 7 non-hygienic colonies of Apis mellifera Linnaeus, 1758 the presence of visible and capped mummies was recorded, one hygienic and 4 non-hygienic colonies showed symptoms of chalkbrood. Twenty-eight days after a massive contamination of the colonies with pollen patties containing Ascosphaera apis Olive & Spiltoir, 195
Iheringia. Série Zoologia. Publicado em: 27/11/2001
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20. Desenvolvimento de uma metodologia para determinação da cobertura de nuvens / Development of a new method to determine the effective cloud-cover index
This work describes the development of a new methodology to field-estimate the sky cloud coverage percentage. This method employs as data base digital images collected by a Charge Coupled Device (CCD) camera, in the visible range of the solar spectra as Red - Green - Blue (RGB) compositions. An algorithm was developed to classify each pixel according to a de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 199909
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21. Residuos de agrotoxicos em morangos e sua redução por lavagem com agua e estocagem em geladeira (5o.C)
According to good agri cultural pract ice (GAP), the pesticides captan, dicofol and mancozeb were applied in strawberries cultivated in experimental fields in simple and double doses. At 0, 1, 4, 7, 14 and 21 day post-harvest intervals the residues of these pesticides were determined after the fruits were washed in running tap water for 1 minute and after st
Publicado em: 1993
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22. Desenvolvimento de sistemas automatizados de adições padrão e eliminação de interferencias em analise espectrofotometricas de rochas, minerais e ligas pela aplicação do metodo generalizado de adições padrão
Correction for the chemical, physical, spectra and/or matricial interferences by standard addition methods generally requires preparation and addition to the sample of a serie of standard solutions. If manual addition procedures are employed, they, besides being tedious, usually involve a relatively large consumption of reagents and samples and a low analyti
Publicado em: 1987
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23. Aflatoxin Contamination of Preharvest Corn as Influenced by Timing and Method of Inoculation
Four corn (Zea mays L.) hybrids were grown in 1977 and 1978 and inoculated with Aspergillus flavus Link 20 or 40 days after silking. Inoculation methods included needle, knife, and multiple-puncture injury to the kernels. The level of aflatoxin contamination, insect damage to the ear, and the percentage of ears having visible greenish A. flavus Link-type mol
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24. Ochratoxin Production by the Aspergillus ochraceus Group and Aspergillus alliaceus
Ochratoxin A is a toxic and carcinogenic fungal secondary metabolite; its presence in foods is increasingly regulated. Various fungi are known to produce ochratoxins, but it is not known which species produce ochratoxins consistently and which species cause ochratoxin contamination of various crops. We isolated fungi in the Aspergillus ochraceus group (secti
American Society for Microbiology.